HighSpeed UART using 9bits

[kp-baraja]

Hello,

Im looking to send UART serial data (1 start bit, 1 stop bit, 9 data bits) at a Baud Rate of 7,750,000. Prevailing opinion online seem to suggest that its possible to do so by repurposing the parity bit in a standard 8 bit comms, but that it would be unlikely to work for high Baud Rates (such as what I need)

Is there a somewhat simple way to implement this communication without moving to more serious hardware like a STM32 microcontroller?

I currently have an implementation sending the data I need over an 8 bit serial interface using an ESP32, but I now need to send an additional bit (hence the need for a 9bit communication)

[sherzaad]

@kp-baraja

I currently have an implementation sending the data I need over an 8 bit serial interface using an ESP32

based on the documentation here and the discussion here, ESP32 does seem to be able to do 9-bit serial.

Maybe try the example, in the link shared and see how it goes...

hope that helps....

[b707]

@kp-baraja

I currently have an implementation sending the data I need over an 8 bit serial interface using an ESP32,

Do you have the code that make ESP32 able to send data in baudrate 7, 750 000 ?

[GolamMostafa]

@kp-baraja

Baud Rate of 7,750,000.

Maximum Bd for UART Port of ESP32:

[johnwasser]

Just out of curiosity I asked Google what the maximum baud rate was for the ESP32. The consensus answer was 5Mbps so your 7.75Mbps might be unattainable on that hardware.